| 摘要 |
The invention provides a system and method for measuring vital signs and motion from a patient. The system features: (i) first and second sensors configured to independently generate time-dependent waveforms indicative of one or more contractile properties of the patient's heart; and (ii) at least three motion-detecting sensors positioned on the forearm, upper arm, and a body location other than the forearm or upper arm of the patient. Each motion-detecting sensor generates at least one time-dependent motion waveform indicative of motion of the location on the patient's body to which it is affixed. A processing component, typically worn on the patient's body and featuring a microprocessor, receives the time-dependent waveforms generated by the different sensors and processes them to determine: (i) a pulse transit time calculated using a time difference between features in two separate time-dependent waveforms, (ii) a blood pressure value calculated from the time difference, and (iii) a motion parameter calculated from at least one motion waveform. |
| 主权项 |
1. A method for measuring vital signs from a patient, comprising:
(a) positioning an optical sensor configured to detect a first time-dependent physiological waveform indicative of one or more contractile properties of the patient's heart on a finger of the patient; (b) positioning a housing on the patient's chest, the housing enclosing (i) an integrated circuit configured to operably connect to at least two electrodes and to determine from signals obtained therefrom a time dependent ECG waveform, and (ii) a first accelerometer configured to generate a first set of time-dependent motion waveforms along three orthogonal axes indicative of motions of the patient's torso; (c) positioning at least two electrodes configured to detect electrical signals from the patient's body and to operably connect to the integrated circuit; (d) positioning a second accelerometer on the upper arm of the patient, the second accelerometer configured to generate a second set of time-dependent motion waveforms along three orthogonal axes indicative of motions of the patient's upper arm; (e) positioning a third accelerometer on the lower arm of the patient, the third accelerometer configured to generate a third set of time-dependent motion waveforms along three orthogonal axes indicative of motions of the patient's lower arm; (f) transmitting the first time-dependent physiological waveform, the time dependent ECG waveform, and the first, second, and third sets of time-dependent motion waveforms to a processing component, wherein at least the time dependent ECG waveform, and the first, second, and third time-dependent motion waveforms are transmitted in the form of synchronized, separately resolvable digital data comprising a header indicating the sensor from which the digital data originates, wherein the processing component receives the first time-dependent physiological waveform, the time dependent ECG waveform, and the first, second, and third sets of time-dependent motion waveforms and determines for the patient a plurality of vital signs comprising (i) a continuously monitored blood pressure; (ii) a continuously monitored posture and activity level, (iii) a continuously monitored SpO2, (iv) a continuously monitored pulse rate, and (v) a continuously monitored ECG; and (g) simultaneously displaying the plurality of vital signs on a patient-specific display component and transmitting the plurality of vital signs to a remote receiver operably connected to a nursing station. |
